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The best part about having a December birthday, according to Gojo Satoru, was the snow. He’d always enjoyed the snow, and more than that enjoyed making a mess with it. It didn’t often snow in Tokyo, and when it did it was very minimal, so on his birthday the two of you took a trip out to the countryside, having rented a little place to stay the night.
You woke up wrapped in each others arms, but nothing could be casual or slow with Gojo. He didn’t like waking early, so when you both woke up to your alarm at a reasonable 11am, it was impossible to convince him just to lay and cuddle. It was his birthday after all. He threw himself out of bed, with you following slowly after. You’d brought sweets with you to enjoy for breakfast and lunch alongside actual food, and he headed straight for them while you actually prepared breakfast for the two of you.
It didn’t take long for Gojo to be throwing your coat and gloves at you, eager to get out in the snow. He was like a puppy, and you could deny him nothing. You dressed into the warm clothes you’d brought along just for this, and trudged out into the snow after him. You watched as Gojo dove into the snow backwards, cackling as he sunk into the several inches of snowfall that had landed while you’d slept, and you couldn’t help the way your heart clenched with pure affection for your lover. You followed after him, offering your hands to help him up, but you were unsurprised when instead he pulled you down to join him, groaning as some of the cold snow touched your unprotected face.
You lay there for a while together, just kissing slowly. Gojo seemed to be right at home there in the snow, his hair blending in despite the hood that separated them. Eventually you did have to draw a line in the sand (or the snow you supposed), and demanded that the two of you at least stand and walk around because just laying there only made you feel colder. Gojo wasn’t going to argue with that because after all, there was one major thing he really wanted to do - have a snowball fight.
That was why you’d planned the trip, something so small. Gojo mentioned his love for snow, and how he was sad it didn’t snow as much in Tokyo as it did in other areas of Japan, and in that same conversation mentioned that even though he loved them, he’d not found someone to have a snowball fight with him since he was a child. You were nothing if not his biggest enabler, so of course you got to booking a trip for you to share. You’d been told more than once by mutual friends - primarily Nanami and Utahime - that you were too soft on him, gave in too easily to his whims. You didn’t much care if they were right or wrong, to be entirely honest, because all you cared about was whether Gojo was happy. He certainly looked happy as he packed snow together into balls, stacking them as he apparently prepared for all-out war.
He’d let down his infinity already, to really get into the “spirit of a snow ball fight”, and you planned to catch him off guard. You’d planned it from the very start. So, when Gojo called out that he was ready, and you confirmed the same, the last thing he’d been expecting was for a snowball to come from behind him.
He turned to figure out what had happened, and was hit by another ball from the direction you weren’t stood in.
“What is this? Ambush!” He yelled, tossing a snowball in the direction that the first one had come from, only to hear the familiar loud laughter of one Itadori Yuuji. A third snowball came pelting his way, and when Gojo whipped around, his glasses almost falling off with the speed of it, he found Kugisaki Nobara. Finally, one of your own snowballs actually hit him, and all Gojo could do when he met your eyes was grin.
“You wanted a snowball fight, right? I figure it’s not much of the war you want if you’re only fighting against me!” You called across the space, and Gojo just laughed loudly, starting to pelt snowballs at the kids. You teamed up with Megumi quickly, finding that he was a very good shot with his snowballs. Yuuji and Nobara teamed up too, leaving Gojo to fend for himself.
All things considered, you had a lot of fun, which you’d not really been expecting. You were even still having fun when Yuuji excitedly tackled you to the snowy ground when he and Nobara won, and Gojo only followed after you both. Megumi followed next, then finally - very reluctantly - Nobara. The five of you lay there together, chatting and laughting despite the cold weather. It felt oddly domestic, sweet.
You made sure to give the kids time to warm up and dry off, then left them in the guest room to enjoy the rest of their afternoon together, a steaming mug of hot chocolate in each of their hands. You returned to Gojo where he sat in the living room, and curled up on the sofa beside him.
“Happy birthday, Satoru.” You murmured, pressing a warm kiss to his lips.
“I can’t believe you brought the kids out here for me.”
“I would do anything for you. Even babysit on my day off so you can have a proper snowball fight.” Gojo set aside his own mug of hot chocolate to haul you up into his lap, arms wrapping around your waist with an easy familiarity that came from your long relationship.
“I love you, sweets.” He said, pushing up his glasses so he could look at you unobstructed.
“I love you too, ‘Toru.” You replied, more than happy to accept the kiss that came next, your arms loosely wrapped around his neck and fingers tangled in his hair.